CN114319640A - Construction method of partially precast concrete shear wall - Google Patents

Construction method of partially precast concrete shear wall Download PDF

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Publication number
CN114319640A
CN114319640A CN202210040936.1A CN202210040936A CN114319640A CN 114319640 A CN114319640 A CN 114319640A CN 202210040936 A CN202210040936 A CN 202210040936A CN 114319640 A CN114319640 A CN 114319640A
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China
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steel
concrete
shaft connecting
connecting end
end column
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CN202210040936.1A
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Chinese (zh)
Inventor
李�杰
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Shanghai Jieyi Architectural Consulting Office
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Shanghai Jieyi Architectural Consulting Office
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Priority to CN202210040936.1A priority Critical patent/CN114319640A/en
Publication of CN114319640A publication Critical patent/CN114319640A/en
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Abstract

The invention discloses a construction method of a partially precast concrete shear wall, which comprises the following steps: step 1: prefabricating a steel-concrete end column in a factory, wherein the steel-concrete end column comprises a strong-shaft connecting end column and a weak-shaft connecting end column; the strong shaft connecting end column comprises I-shaped steel and concrete filled on two sides of a web plate of the I-shaped steel, the weak shaft connecting end column comprises I-shaped steel and concrete filled on one side of the web plate of the I-shaped steel, one side of the two sides of the web plate, which is filled with the concrete, is called a far side, and the other side of the two sides of the web plate is called a near side; step 2: arranging wall body reinforcing steel bars, wherein the wall body reinforcing steel bars are connected with the reinforced concrete end columns; and step 3: and (4) installing the steel-concrete end column on a construction site, and then pouring wall concrete. The method for constructing the partially precast concrete shear wall adopts the modes of precast steel-concrete end columns and cast-in-place concrete wall bodies to construct the shear wall, the steel-concrete end columns have good restraint on the concrete wall bodies, the cracks of the wall plates can be obviously inhibited, the bearing capacity of the shear wall is improved, and the integral ductility of the shear wall is improved.

Description

Construction method of partially precast concrete shear wall
Technical Field
The invention relates to the field of buildings, in particular to a construction method of a partially precast concrete shear wall.
Background
At present, most of high-rise fabricated buildings are reinforced concrete shear wall structures, because the reinforced concrete shear wall has high in-plane lateral force resisting rigidity and good overall performance, can effectively resist earthquake horizontal force, and meets the requirements for lateral displacement of the high-rise structures in the specification. The shear wall edge constraint condition is closely related to the seismic performance of the shear wall, and from the conventional shear wall damage condition of buildings in earthquake-damaged areas, the shear wall edge member is often a weak link damaged by load, and the seismic performance of the shear wall can be effectively improved by enhancing the edge resistance strength.
The requirements of a large amount of on-site wet operations on construction period and manpower are high, the on-site wet operations need to be abandoned step by step in order to promote building industrialization, but because the lateral force resistance requirements of high-rise buildings on the shear wall and the requirements of most of houses and apartments on large indoor spaces without convex columns, the existing shear wall components can not be eliminated, and therefore a lot of precast concrete shear walls appear in the market. However, because the precast concrete shear wall, that is, the PC shear wall, has a higher precision requirement (millimeter level) for positioning the vertical steel bars when being installed, the precast concrete shear wall has very strict limitations on production and construction installation, even if factory detection is qualified, the situation that workers steal and cut the connecting steel bars due to inaccurate field installation still often occurs, and the quality of the irregular installation cannot be detected unless the irregular installation is pulled out again.
Disclosure of Invention
The invention aims to solve the technical problem that the prefabricated concrete shear wall in the prior art has high requirement on installation precision, so that the installation is very difficult.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a construction method of a partially precast concrete shear wall comprises the following steps:
step 1: prefabricating a steel-concrete end column in a factory, wherein the steel-concrete end column comprises a strong-axis connecting end column and a weak-axis connecting end column, the strong-axis connecting end column means that a web plate of I-shaped steel in the end column is parallel to a wall body, and the weak-axis connecting end column means that the web plate of the I-shaped steel in the end column is vertical to the wall body; the strong shaft connecting end column comprises I-shaped steel and concrete filled on two sides of an I-shaped steel web plate, the weak shaft connecting end column comprises I-shaped steel and concrete filled on one side of the I-shaped steel web plate, one side of the web plate, filled with the concrete, is called a far side, the other side of the web plate is called a near side, concrete is not poured on the near side, and the near side and a wall body are poured with the concrete together at the later stage of installation;
step 2: arranging wall body reinforcing steel bars, wherein the wall body reinforcing steel bars are connected with the reinforced concrete end columns;
and step 3: and (4) installing the steel-concrete end column on a construction site, and then pouring wall concrete.
In step 2, for the strong axis connecting end post, there are two connection modes of the wall body steel bar and the strong axis connecting end post:
the first method comprises the following steps: wall body reinforcing steel bars are anchored into the end columns connected with the strong shafts; the width of a wing plate of the I-shaped steel of the strong shaft connecting end post is 30-50mm smaller than the thickness of the wall body of the shear wall, and a certain space is reserved for the wall body steel bar; one end of the wall body reinforcing steel bar is provided with a bending section, the bending section is welded on the inner wall of an I-shaped steel wing plate of the end post connected by the strong shaft, and the bending section simultaneously plays a role of reinforcing the reinforcing steel bar in the end post; the outer surface of the I-shaped steel wing plate of the strong shaft connecting end post is provided with an anti-shearing stud.
And the second method comprises the following steps: the wall body steel bar is not anchored into the end column of the strong shaft connection; the width of the wing plate of the I-steel of the strong shaft connecting end post can be consistent with the thickness of a wall body, the outer surface of the wing plate of the I-steel of the strong shaft connecting end post is provided with a shear-resistant gusset plate, the cross section of the shear-resistant gusset plate is T-shaped, the shear-resistant gusset plate is provided with a through hole, and the wall body steel bar penetrates through the through hole; the perforation is a trapezoidal hole or an oblong hole.
In step 2, for the weak axis connecting end column, there are two connection modes of the wall body steel bar and the weak axis connecting end column:
the first method comprises the following steps: one end of the wall body steel bar is inserted into the near side of the I-steel of the weak shaft connecting end column and is welded with the inner wall of the wing plate;
and the second method comprises the following steps: the shearing resistant node plate is arranged near the I-steel of the weak shaft connecting end column and welded with a web plate of the I-steel of the weak shaft connecting end column, the cross section of the shearing resistant node plate is T-shaped, a through hole is formed in the shearing resistant node plate, and the wall body steel bar penetrates through the through hole; the perforation is a trapezoidal hole or an oblong hole.
Except for the above mentioned situation that the bent section of the wall body steel bar is used as the reinforcing steel bar, in general, the two sides of the web plate of the I-shaped steel of the strong shaft connecting end column are provided with the door-shaped reinforcing steel bars, and the far side of the I-shaped steel of the weak shaft connecting end column is provided with the door-shaped reinforcing steel bars; the door-shaped reinforcing steel bars with different heights are welded with the longitudinal steel bars.
Further, the construction method of the present invention further comprises step 4: the butt joint area is reserved at the two ends of the I-steel of the steel-concrete end column, the flange plates of the I-steel of the butt joint area are provided with the lug plates, the lug plates on the I-steel of the upper layer steel-concrete end column and the lower layer steel-concrete end column are temporarily fixed through common steel plate clamping or are temporarily fixed through a door-shaped steel plate, the web plates of the I-steel of the upper layer steel-concrete end column and the web plates of the I-steel of the lower layer steel-concrete end column are clamped through the clamping plates after the temporary fixing, then the clamping plates and the I-steel of the upper layer steel-concrete end column and the I-steel of the lower layer steel-concrete end column are fixed through the butt bolts, and finally concrete is poured at the butt joint position of the upper layer steel-concrete end column and the lower layer steel-concrete end column. The door-shaped steel plates are used for temporarily fixing the lug plates so as to facilitate the concrete pouring at the butt joint positions, and the door-shaped steel plates are used as templates for pouring concrete at the back of the butt joint areas.
Has the advantages that: (1) the method for constructing the partially precast concrete shear wall adopts the modes of precast steel-concrete end columns and cast-in-place concrete wall bodies to construct the shear wall, the steel-concrete end columns have good restraint on the concrete wall bodies, the cracks of the wall plates can be obviously inhibited, the bearing capacity of the shear wall is improved, and the integral ductility of the shear wall is improved. (2) The construction method of the partial precast concrete shear wall adopts the traditional beam-column steel structure node, the node form is simple, the cast-in-place concrete wall body has the through-stressed reinforcing steel bars, and the problem of the installation quality of the vertical node of the precast concrete shear wall is solved. (3) The construction method of the partial precast concrete shear wall combines the advantages of the precast concrete shear wall and the cast-in-place concrete shear wall, the end post of a higher floor can be installed after the end post is installed, the wall body does not need to be poured, the construction efficiency is not influenced, and the cost can be reduced to be close to that of the traditional cast-in-place shear wall.
Drawings
FIG. 1 is a horizontal node diagram of a shear wall of example 1.
FIG. 2 is a diagram of vertical nodes of a shear wall of example 1.
Fig. 3 is a perspective view of a shear wall of example 2.
Fig. 4 is a perspective view (in another form) of a shear wall of example 2.
FIG. 5 is a horizontal node diagram of a shear wall of example 3.
FIG. 6 is a diagram of vertical nodes of a shear wall of example 3.
FIG. 7 is a horizontal node diagram of a shear wall of example 4.
FIG. 8 is a horizontal node diagram (in another form) of the shear wall of example 4.
FIG. 9 is a horizontal node diagram of a shear wall of example 5.
Wherein: 100. the strong shaft is connected with the end post; 200. i-shaped steel; 210. a docking area; 220. an ear plate; 230. a plain steel plate; 240. a steel plate shaped like a Chinese character 'men'; 250. reinforcing steel bars shaped like a Chinese character 'men'; 300. wall body reinforcing steel bars; 400. longitudinal reinforcing steel bars; 500. shear resistant studs; 600. a splint; 700. wall concrete; 800. a shear resistant gusset plate; 810. a trapezoidal hole; 820. a long round hole; 900. the weak shaft is connected with the end post.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
Example 1
As shown in fig. 1, the method for constructing a partially precast concrete shear wall according to this embodiment includes the following steps:
step 1: prefabricating the strong shaft connecting end post 100 in a factory; selecting proper I-shaped steel 200, wherein the width of a wing plate of the I-shaped steel 200 is 30-50mm smaller than the thickness of the wall body of the shear wall; then bending one end of the wall body steel bar 300 to form a bending section, welding the bending section on the inner wall of the I-shaped steel 200 wing plate of the strong shaft connecting end post 100, and connecting the wall body steel bars 300 with different heights through the longitudinal steel bar 400; the outer surface of the flange of the I-shaped steel 200 of the strong shaft connecting end post 100 is provided with a shear-resistant stud 500; as shown in fig. 2, butt joint regions 210 are reserved at two ends of an i-beam 200 of the strong shaft connecting end column 100, and lug plates 220 are arranged on wing plates of the i-beam 200 of the butt joint regions 210; finally, concrete is poured on two sides of the web plate of the I-beam 200, the butt joint area 210 is left empty, and concrete is not poured;
step 2: the strong shaft connecting end column 100 is transported to a construction site for installation, and then wall concrete 700 is poured;
and step 3: as shown in fig. 2, the strong shaft connecting end column 100 of the upper and lower layers is connected by temporarily fixing the ear plate 220 by using the common steel plate 230 and the bolt, clamping the web of the i-steel 200 of the upper and lower layers by using the clamping plate 600 after temporarily fixing, and fixing the clamping plate 600 and the i-steel 200 of the upper and lower layers by using the opposite-penetrating bolt;
and 4, step 4: and (5) erecting a formwork in the butt joint area 210, casting concrete later, and cutting off the lug plate 220 after casting is completed.
Example 2
As shown in fig. 3 and 4, the construction method of the partially precast concrete shear wall of the present embodiment is substantially the same as that of embodiment 1, except that:
in the construction method of this embodiment, the wall body reinforcing steel bars 300 are not anchored into the strong shaft connecting end column 100, the shear-resistant gusset plate 800 is arranged on the outer surface of the wing plate of the i-steel 200 of the strong shaft connecting end column 100, the cross section of the shear-resistant gusset plate 800 is in a T shape, the shear-resistant gusset plate 800 is provided with through holes, the wall body reinforcing steel bars 300 pass through the through holes, and the through holes are trapezoidal holes 810 or long round holes 820.
Example 3
As shown in fig. 5 and 6, the method for constructing a partially precast concrete shear wall according to this embodiment includes the following steps:
step 1: prefabricating the weak shaft connecting end post 900 in a factory; the web of the I-shaped steel 200 of the weak shaft connecting end post 900 is vertical to the wall body, one side of two sides of the web, which is close to the wall body, is called a near side, and one side of the web, which is far away from the wall body, is called a far side; arranging a reinforcement bar 250 shaped like a Chinese character 'men' on the far side of the I-shaped steel 200; the door-shaped reinforcing steel bars 250 with different heights are welded with the longitudinal steel bars 400, and then concrete is poured on the far side; one end of the wall body reinforcing steel bar 300 is inserted into the near side of the I-steel 200 of the weak shaft connecting end column 900 and welded with the inner wall of the wing plate;
step 2: transporting the weak shaft connecting end post 900 to a construction site for installation, and then pouring wall concrete 700;
consistent with embodiment 1, the weak axis connection end column 900 in this embodiment also needs to reserve the butt-joint region 210 and the ear plate 220 at the two ends of the i-beam 200, and the specific connection mode of the upper and lower layer weak axis connection end columns 900 is the same as that in embodiment 1, and is not described again.
Example 4
As shown in fig. 7 and 8, the construction method of the partially precast concrete shear wall of the present embodiment is substantially the same as that of embodiment 3, except that:
in the construction method of the embodiment, the wall body reinforcing steel bars 300 are not welded with the i-steel 200 of the weak shaft connecting end column 900, in the embodiment, the shear-resistant node plate 800 is arranged near the i-steel 200 of the weak shaft connecting end column 900, the shear-resistant node plate 800 is welded with the web of the i-steel 200 of the weak shaft connecting end column 900, the cross section of the shear-resistant node plate 800 is in a T shape, the shear-resistant node plate 800 is provided with through holes, the wall body reinforcing steel bars 300 pass through the through holes, and the through holes are trapezoidal holes 810 or long round holes 820.
Example 5
For embodiment 1, the strong shaft connecting end columns 100 of the upper layer and the lower layer adopt common steel plates 230 and bolt temporary fixing lug plates 220, and an additional formwork is required to be additionally arranged in the butt joint area 210 during post-pouring of concrete; in this embodiment, the door-shaped steel plates 240 as shown in fig. 9 are directly used to temporarily fix the ear plates 220, and the door-shaped steel plates 240 can be used as a form for post-pouring concrete in the butt-joint region 210.
Although the embodiments of the present invention have been described in the specification, these embodiments are merely provided as a hint, and should not limit the scope of the present invention. Various omissions, substitutions, and changes may be made without departing from the spirit of the invention and are intended to be within the scope of the invention.

Claims (10)

1. A construction method of a partially precast concrete shear wall is characterized by comprising the following steps:
step 1: prefabricating a steel-concrete end column in a factory, wherein the steel-concrete end column comprises a strong-shaft connecting end column and a weak-shaft connecting end column; the strong shaft connecting end column comprises I-shaped steel and concrete filled on two sides of a web plate of the I-shaped steel, the weak shaft connecting end column comprises I-shaped steel and concrete filled on one side of the web plate of the I-shaped steel, one side of the two sides of the web plate, which is filled with the concrete, is called a far side, and the other side of the two sides of the web plate is called a near side;
step 2: arranging wall body reinforcing steel bars, wherein the wall body reinforcing steel bars are connected with the reinforced concrete end columns;
and step 3: and (4) installing the steel-concrete end column on a construction site, and then pouring wall concrete.
2. The method of constructing a partially precast concrete shear wall according to claim 1, wherein: in the step 2, wall body reinforcing steel bars are anchored into the strong shaft connecting end post, one end of each wall body reinforcing steel bar is provided with a bending section, and the bending sections are welded on the inner wall of an I-shaped steel wing plate of the strong shaft connecting end post; the outer surface of the I-shaped steel wing plate of the strong shaft connecting end post is provided with an anti-shearing stud.
3. The method of constructing a partially precast concrete shear wall according to claim 2, wherein: the width of the wing plate of the I-shaped steel of the strong shaft connecting end post is 30-50mm smaller than the thickness of the wall body of the shear wall.
4. The method of constructing a partially precast concrete shear wall according to claim 1, wherein: in the step 2, a shear-resistant gusset plate is arranged on the outer surface of the I-shaped steel wing plate of the strong-shaft connecting end column, the cross section of the shear-resistant gusset plate is T-shaped, a through hole is formed in the shear-resistant gusset plate, and the wall body steel bar penetrates through the through hole.
5. The method of constructing a partially precast concrete shear wall according to claim 1, wherein: in the step 2, one end of the wall body steel bar is inserted into the near side of the I-steel of the weak shaft connecting end column and welded with the inner wall of the wing plate.
6. The method of constructing a partially precast concrete shear wall according to claim 1, wherein: in the step 2, a shear-resistant gusset plate is arranged near the i-steel of the weak shaft connecting end column, the shear-resistant gusset plate is welded with a web of the i-steel of the weak shaft connecting end column, the cross section of the shear-resistant gusset plate is T-shaped, a through hole is formed in the shear-resistant gusset plate, and the wall body reinforcing steel bar penetrates through the through hole.
7. The method of constructing a partially precast concrete shear wall according to claim 4 or 6, wherein: the perforation is a trapezoidal hole or an oblong hole.
8. A method of constructing a partially precast concrete shear wall according to any one of claims 4 to 6, wherein: the two sides of the web plate of the I-shaped steel of the strong shaft connecting end column are provided with door-shaped reinforcing steel bars, and the far side of the I-shaped steel of the weak shaft connecting end column is provided with door-shaped reinforcing steel bars; the door-shaped reinforcing steel bars with different heights are welded with the longitudinal steel bars.
9. The method of constructing a partially precast concrete shear wall according to claim 1, wherein: further comprising the step 4: after the upper and lower steel-concrete end columns are in butt joint, the web plates of the I-shaped steel of the upper and lower steel-concrete end columns are clamped by the clamping plates, then the clamping plates and the I-shaped steel of the upper and lower steel-concrete end columns are fixed by the through bolts, and finally concrete is poured at the butt joint of the upper and lower steel-concrete end columns.
10. The method of constructing a partially precast concrete shear wall of claim 9, wherein: butt joint areas are reserved at two ends of I-shaped steel of the reinforced concrete end column, lug plates are arranged on wing plates of the I-shaped steel in the butt joint areas, the lug plates on the I-shaped steel of the upper and lower layers of reinforced concrete end columns are temporarily fixed through door-shaped steel plates, the butt joint areas are sealed by the door-shaped steel plates, and the door-shaped steel plates are used as templates for post-pouring concrete in the butt joint areas.
CN202210040936.1A 2022-01-14 2022-01-14 Construction method of partially precast concrete shear wall Pending CN114319640A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210040936.1A CN114319640A (en) 2022-01-14 2022-01-14 Construction method of partially precast concrete shear wall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210040936.1A CN114319640A (en) 2022-01-14 2022-01-14 Construction method of partially precast concrete shear wall

Publications (1)

Publication Number Publication Date
CN114319640A true CN114319640A (en) 2022-04-12

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ID=81027286

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210040936.1A Pending CN114319640A (en) 2022-01-14 2022-01-14 Construction method of partially precast concrete shear wall

Country Status (1)

Country Link
CN (1) CN114319640A (en)

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